How To Use A Voltmeter To Test Car Battery. Run the car and check for the new. While we specialize primarily in used car sales at our many locations to begin your location and phone number we also are aware that it really pays to know what to loo.
Adjust the multimeter to about 15-20 Volts. Connect the multimeter to the positive and negative battery terminals. Second we will measure the current.
We will use a 9-volt transistor battery for this guide.
At about 80 degrees a fully charged battery will be around 125-126 volts. This will help to remove any surface charge in the battery. Hook the multimeter to the battery terminals. Any reading of voltage below 95 volts or if the battery holds a good record for a while and steadily drops or even when it falls instantly to 0 volts then it means there is a problem and the battery.
